2003A&A...406..629M


Query : 2003A&A...406..629M

2003A&A...406..629M - Astronomy and Astrophysics, volume 406, 629-638 (2003/8-1)

X-ray variability of Pleiades late-type stars as observed with the ROSAT-PSPC.

MARINO A., MICELA G., PERES G. and SCIORTINO S.

Abstract (from CDS):

We present a comprehensive analysis of X-ray variability of the late-type (dF7-dM) Pleiades stars, detected in all ROSAT-PSPC observations; X-ray variations on short (hours) and medium (months) time scales have been explored. We have grouped the stars in two samples: 89 observations of 42 distinct dF7-dK2 stars and 108 observations of 61 dK3-dM stars. The Kolmogorov-Smirnov test applied on all X-ray photon time series show that the percentage of cases of significant variability is quite similar on both samples, suggesting that the presence of variability does not depend on mass for the time scales and mass range explored. The comparison between the Time X-ray Amplitude Distribution functions (XAD) of the set of dF7-dK2 and of the dK3-dM show that, on short time scales, dK3-dM stars show larger variations than dF7-dK2. A subsample of eleven dF7-dK2 and eleven dK3-dM Pleiades stars allows the study of variability on longer time scales: we found that variability on medium - long time scales is relatively more common among dF7-dK2 stars than among dK3-dM ones. For both dF7-dK2 Pleiades stars and dF7-dK2 field stars, the variability on short time scales depends on Lx while this dependence has not been observed among dK3-dM stars. It may be that the variability among dK3-dM stars is dominated by flares that have a similar luminosity distribution for stars of different Lx, while flaring distribution in dF7-dK2 stars may depend on X-ray luminosity. The lowest mass stars show significant rapid variability (flares?) and no evidence of rotation modulation or cycles. On the contrary, dF7-dK2 Pleiades stars show both rapid variability and variations on longer time scales, likely associated with rotational modulation or cycles.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: Pleiades - stars: coronae - stars: late-type - stars: rotation - X-ray: stars

CDS comments: Tables 2,3 : HII-NNN = Cl Melotte 22 NNN, AK-1B121 = Cl* Melotte 22 AK I-2-121.

Simbad objects: 87

goto Full paper

goto View the references in ADS

Number of rows : 87
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* V610 Tau Y*O 03 42 03.843552 +24 42 45.44820   14.91 13.55 13.04 11.73 M: 27 0
2 V* LS Tau Y*O 03 43 05.5354958173 +24 49 28.630809474   17.132 15.609   13.070 ~ 32 0
3 V* V700 Tau Y*O 03 43 26.6173423430 +24 59 39.591180544   13.58 12.50   11.40 ~ 52 0
4 2MASS J03432712+2523152 Y*O 03 43 27.1245634067 +25 23 15.299900857   12.172 11.364 11.21 10.419 ~ 38 0
5 V* V436 Tau Y*O 03 43 28.2016357074 +24 53 31.195552333     17.53   15.04 ~ 29 0
6 V* LZ Tau Y*O 03 43 36.692544 +24 13 56.31528   15.97 14.48 14.41   M0.5e 46 0
7 V* MO Tau Er* 03 43 42.1404545160 +24 34 23.587609260 19.78 17.02 15.4     M3Ve 37 0
8 V* V1271 Tau RS* 03 43 48.3323982308 +25 00 15.795725924   12.47 11.62 11.69   ~ 62 0
9 Cl Melotte 22 193 Er* 03 43 50.7027203376 +24 14 50.970564132 12.46 12.10 11.29     ~ 56 0
10 V* V847 Tau Er* 03 43 51.7488469023 +24 14 16.175469511 20.566         ~ 39 0
11 V* MR Tau Er* 03 43 52.1468914179 +24 50 29.809898223   16.00       K7V 61 0
12 V* MS Tau Er* 03 43 55.6869949730 +24 25 35.099244442   15.705 14.339   12.539 K7e 54 0
13 V* MU Tau Y*O 03 44 02.2778311589 +25 03 53.830725482   15.30       ~ 32 0
14 V* V1272 Tau BY* 03 44 03.5401148521 +24 30 15.284314309   11.8 10.762   9.933 G1V 69 0
15 Cl Melotte 22 250 Y*O 03 44 04.2484463654 +24 59 23.385528138   11.4 10.7     G2 58 0
16 V* V1168 Tau BY* 03 44 04.8395264080 +24 16 31.874754111   12.42 11.54     G4 67 0
17 Cl* Melotte 22 DH 314 Er* 03 44 09.5955816634 +24 35 22.450637663     17.00     ~ 29 0
18 V* MW Tau Y*O 03 44 16.4514330310 +23 37 04.232309158           ~ 26 0
19 V* V514 Tau Y*O 03 44 23.3929741920 +25 21 30.141443448   18.45 16.80     ~ 27 0
20 V* V630 Tau Er* 03 44 24.6823879427 +24 51 53.527011222           ~ 30 0
21 V* V1170 Tau BY* 03 44 26.2759113581 +24 35 22.939007310 14.435 12.288 11.461   10.520 G8V 73 0
22 V* NP Tau Er* 03 44 28.0030714536 +24 10 17.615581608 15.965   13.46     M0.5Ve 69 0
23 HD 23269 Er* 03 44 40.7575766283 +24 49 06.729381349   10.4 10.0     F8V 91 0
24 V* V785 Tau Er* 03 44 50.1780343951 +24 54 40.045323288   14.53 13.34   12.00 K5Ve 56 0
25 * 17 Tau Be* 03 44 52.5368818 +24 06 48.011217 3.19 3.59 3.70 3.71 3.80 B6IIIe 390 1
26 2MASS J03445383+2355165 Y*O 03 44 53.8394313804 +23 55 16.634498368   11.61 10.81   9.87 GIV 53 0
27 V* V744 Tau Er* 03 45 01.1323360751 +24 46 41.218133125     18.00   15.00 ~ 29 0
28 2MASS J03450400+2515282 Y*O 03 45 04.0131579092 +25 15 28.255253589   11.4 10.7   9.97 ~ 55 0
29 V* V811 Tau BY* 03 45 21.1862906887 +23 43 38.888404751 14.771 13.67 12.57   11.24 G5 73 0
30 V* OS Tau SB* 03 45 23.4912858258 +24 51 02.888389499   16.821 15.349   13.163 M2e 52 0
31 HD 23352 * 03 45 24.1269375603 +24 53 09.534285718   10.3 9.8   9.05 F5V 69 0
32 V* V1085 Tau BY* 03 45 35.3982230827 +24 04 59.563296540   10.73 11.92 10.04 9.37 F2 74 0
33 V* V1041 Tau Y*O 03 45 39.4002482170 +23 45 15.469362585 14.355 13.52 12.41 11.99 10.83 G9V 58 0
34 V* V855 Tau Y*O 03 45 40.1782648711 +24 37 38.007136109   10.6 9.9   9.05 F9V 85 1
35 BD+23 513 PM* 03 45 41.4028309968 +24 17 18.960639396 10.08 9.97 9.45 9.31 8.79 F5V 59 1
36 BD+23 514 Y*O 03 45 41.8552074456 +24 25 53.455915128   12.08 11.36 11.15 10.42 G5 53 0
37 V* V787 Tau Y*O 03 45 44.0741145373 +24 04 26.818586757   15.63 14.23   12.51 ~ 45 0
38 Cl Melotte 22 761 Y*O 03 45 44.4132583283 +24 13 13.134939048   11.22 10.55   9.77 G2V 63 0
39 2MASS J03460275+2344146 Y*O 03 46 02.7603231732 +23 44 14.563747668   13.86 12.61   11.05 G4V 52 0
40 V* V812 Tau BY* 03 46 04.1263211184 +23 24 19.878193476 14.725 13.73 12.66   11.62 K3V 69 0
41 V* V638 Tau Er* 03 46 07.5105770443 +24 22 27.793818455   16.04 14.71   12.83 M0e 54 0
42 V* OX Tau Y*O 03 46 09.898608 +24 40 25.07124   16.82 15.29 14.82 12.81 M2.5e 46 0
43 BD+22 548 Y*O 03 46 10.0423522944 +23 20 24.045862524   10.8 10.18   9.46 G0 62 0
44 V* V1189 Tau BY* 03 46 12.8676359335 +24 03 15.754257358   15.59 14.22   12.48 KV 47 0
45 BD+23 521 * 03 46 17.9919005844 +23 29 11.939258173 11.984 11.4 10.6   9.59 F8V 44 0
46 V* V1045 Tau BY* 03 46 22.6697529823 +24 34 12.539066238   11.4 10.8   9.71 F8 74 0
47 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3208 0
48 V* OZ Tau Er* 03 46 25.3897599128 +24 09 36.475521778   17.09 16.05 15.59 13.37 ~ 45 0
49 HD 282952 Y*O 03 46 27.3523093248 +25 08 07.920713904   11.3 10.9     F9 58 0
50 V* V641 Tau Y*O 03 46 27.7743108351 +23 35 33.771415161 15.602 14.28 13.05   11.52 K0V 82 0
51 V* V1171 Tau BY* 03 46 28.4126681681 +24 26 02.158117224   11.85 11.10 10.5 10.26 G5V 72 1
52 V* PP Tau Y*O 03 46 31.1851066172 +24 07 02.431428754   15.60 14.21   12.39 K5V 62 0
53 V* V448 Tau Y*O 03 46 35.9117232840 +23 58 01.275542652   15.42 14.02     KV 39 0
54 V* V642 Tau Er* 03 46 37.284936 +24 20 36.71124   13.362 12.321 11.964 10.97 K5V 70 0
55 HD 282975 Y*O 03 46 37.6798897555 +23 47 15.790663787 11.533 10.8 10.0   9.43 G6V 71 0
56 V* V814 Tau BY* 03 46 39.3864483531 +24 01 46.867039992   13.04 12.13   11.24 K3V 80 0
57 V* V1065 Tau RS* 03 46 40.2476949658 +23 29 51.877806260 14.016 13.01 12.02   10.93 G7V 69 0
58 V* PV Tau Er* 03 46 53.6047809404 +24 17 15.019101370     16.27 15.86 13.53 M: 56 0
59 BD+23 527 Er* 03 46 53.7464379963 +23 35 00.796614675 11.607 11.1 10.6   9.85 G0V 75 0
60 V* V1046 Tau Er* 03 46 54.9177933516 +24 47 46.825737223   11.5 10.6   9.79 G5 63 0
61 V* PY Tau Er* 03 46 58.5325813747 +24 27 40.056483867     17.4   14.56 ~ 37 0
62 V* V645 Tau Er* 03 47 13.6612046375 +23 49 53.391715091   17.13 15.78   13.31 ~ 42 2
63 V* V864 Tau Er* 03 47 26.7603537076 +23 38 02.655902239     17.80   14.70 ~ 30 0
64 V* QT Tau Er* 03 47 30.5901662515 +24 22 13.950211752   17.290 15.795   13.502 ~ 42 0
65 V* QV Tau Er* 03 47 33.4806047064 +23 41 32.253419112   17.21 15.74 15.45 13.16 M: 45 0
66 V* V793 Tau Er* 03 47 40.3754786066 +24 18 07.004668507   15.18 13.95 13.50 12.30 M: 56 0
67 HD 282967 Y*O 03 47 40.4453488845 +24 21 52.409176663   11.12 10.48   9.79 G5 74 0
68 V* QX Tau Y*O 03 47 41.4393422685 +23 58 18.939833580   14.85 13.58   12.11 K8e 84 0
69 HD 282973 PM* 03 47 52.5260476469 +23 56 28.428947463   10.41 9.87   9.24 G0 80 0
70 BD+23 546 * 03 47 55.5890026968 +23 27 54.080493552   12.04 11.33     ~ 17 0
71 HD 23713 ** 03 48 07.1684166120 +24 08 31.430682996   9.86 9.43 9.32 8.64 F7V 94 0
72 BD+23 551 * 03 48 16.9038570375 +23 38 12.420299844 10.74 10.67 10.11   9.48 F9V 64 0
73 2MASS J03481705+2337435 * 03 48 17.0465936208 +23 37 43.573249956           F9V 24 0
74 HD 282971 PM* 03 48 26.1648308529 +24 02 54.196833236   10.6 10.2   9.39 F8 85 0
75 2MASS J03483451+2326053 Y*O 03 48 34.5103551864 +23 26 05.248800743   11.2 10.7   9.66 G0V 62 0
76 Cl Melotte 22 2027 Y*O 03 48 48.9539567589 +24 16 02.586202857   11.77 10.91   10.01 G2V 62 0
77 V* V545 Tau Y*O 03 48 49.3174984680 +23 58 38.132788908   13.61 12.65   11.50 K2.5e 78 0
78 V* V1282 Tau RS* 03 49 06.1083396732 +23 46 52.469922436   11.63 10.803 9.8 9.831 G7IV 81 0
79 V* V356 Tau Er* 03 49 11.0315008735 +24 20 51.356829337   19.18 17.43   14.64 ~ 37 0
80 HD 282965 SB* 03 49 11.7330709952 +24 38 11.688977570 11.15 11.2 10.6 9.88 9.74 F9V 54 0
81 V* V468 Tau Er* 03 49 36.5245511568 +24 18 14.186745036     17.23   14.68 M3.7 33 0
82 V* V469 Tau Er* 03 50 15.2600917383 +24 13 36.261144332   19.51 17.54   14.64 ~ 30 0
83 Cl Melotte 22 2644 Y*O 03 50 20.9059818720 +24 28 00.290041788   11.76 11.03   10.32 ~ 48 0
84 V* V1176 Tau Er* 03 50 54.3588780269 +23 50 05.237700840   12.43 11.48 10.99 10.47 K2 63 0
85 Cl Melotte 22 2880 Y*O 03 50 55.0845587305 +24 11 50.781812049   12.61 11.75     ~ 36 0
86 V* V379 Tau Y*O 03 51 11.5285723896 +24 23 13.175259576   17.737 16.195   13.641 ~ 26 0
87 V* V558 Tau Y*O 03 51 25.8654280584 +24 47 38.973214932   17.827 16.232   13.554 ~ 27 0

To bookmark this query, right click on this link: simbad:objects in 2003A&A...406..629M and select 'bookmark this link' or equivalent in the popup menu


2022.08.10-06:51:09

© Université de Strasbourg/CNRS

    • Contact